Although I don't like it, I often use WordPad on Windows machines because there is a bug in Notepad. If you have Notepad open with word-wrap on, it will insert line breaks into newly edited lines where they wrap on the screen. When I have to quickly edit and save a text file on some random Windows machine, I use WordPad to avoid polluting the file with out of place line breaks.
In Notepad I like to turn off word-wrap and make sure everything looks right before saving the file each time after I edit.
Basically without word-wrap each paragraph will be one long line of sentences.
With "paragraphs" separated by blank lines.
Then copying the non-word-wrapped text from Notepad, and pasting into an email window or message box allows the target window to display using its own word-wrap without the extraneous line breaks.
Then the receiver's email window can usually handle it when it is scaled differently than the sender, and it will be OK in both places.